Low profile static wellhead plug
AssigneeHalliburton Energy Services, Inc.
InventorJames D. Vick, Jr.
Life of this patent
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Abstract
A plug is provided for use in conjunction with a subterranean well. In a described embodiment, a wellhead plug includes multiple outwardly extendable lugs for engagement with corresponding multiple oppositely facing shoulders formed internally on a bore extending in a wellhead. The lugs engage the shoulders to thereby resist pressure applied to the plug in the bore from above or below.
Claims46
A wellhead plug system, comprising:
- a wellhead having first and second oppositely facing shoulders internally formed on a bore extending in the wellhead;
- and
- a plug sealingly received in the bore, the plug including at least one radially outwardly extendable first lug engaging the first shoulder and preventing displacement of the plug relative to the bore in a first direction, and at least one radially outwardly extendable second lug engaging the second shoulder and preventing displacement of the plug relative to the bore in a second direction opposite to the first direction, the first lug engaging the first shoulder while the second lug is engaged with the second shoulder.
A wellhead plug for sealing engagement with a wellhead having first and second oppositely facing shoulders internally formed on a bore extending in the wellhead, the plug comprising:
- at least one radially outwardly extendable first lug engageable with the first shoulder for preventing displacement of the plug relative to the bore in a first direction;
- and
- at least one radially outwardly extendable second lug engageable with the second shoulder for preventing displacement of the plug relative to the bore in a second direction opposite to the first direction, and
- wherein the first lug is engageable with the first shoulder while the second lug is engaged with the second shoulder.
A plug for sealing engagement within a bore having first and second oppositely facing shoulders internally formed thereon, the plug comprising:
- first and second outwardly extendable lugs, the first lug being engageable with the first shoulder while the second lug is engaged with the second shoulder to thereby prevent displacement of the plug relative to the bore in response to a pressure differential across the plug in the bore;
- and
- an extender mechanism operative to extend the first and second lugs outward.
A plug for sealing engagement within a bore having opposing shoulders internally formed thereon, the plug comprising:
- at least one lug which extends outwardly from the plug and engages the opposing shoulders, thereby preventing displacement of the plug in first and second opposite axial directions relative to the bore.
A method of installing a plug in a bore of a wellhead, the method comprising the steps of:
- engaging an external shoulder of the plug with a no-go shoulder formed on the bore;
- and
- then outwardly extending at least one lug of the plug into engagement with opposing shoulders of a profile formed on the bore, thereby preventing displacement of the plug in first and second opposite axial directions relative to the bore.
Dependencies are inferred from the claim text.